Rust-removing compound



W said rust removin Patented Aug. 4, 19 25.

JOHN J. vann' BUHLER,

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nusr-anmovmc comrcurrn.

No Drawing.

To all whom it may concern: Be it known that I, JOHN J. VARN BUHLER, a citizen of the United States, residing at Detroit, county of Wayne, State of Michi an, have invented a certain new and useful mprovement in Rust-Removing Compounds, of which the following is a specification. My present invention relates to a metal cleaning compound intended particularly 10 for use in cleaning surfaces of metal parts which are subsequently to be painted or enameled. In my prior application filed December 28, 1921, Serial No. 525,472, and in my Patent No. 1,473,529, November 6, 1923, I have described metal cleaning compounds comprising essentially a rust prev venting liquid, an acid and alcohol. In my said application I have claimed specifically linseed oil as the preferred rust preventing 24) liquid and in my said patent I have claimed specifically glycerine as the rust preventingl1 uid.

' 7 present invention is an improvement on the inventions described in said appli- 25 cation and patent and consists broadly in employing acetic acid, either'in addition to the rust removing acid specified in the said formulae contained in said application and patent or in substituting for a portion of acid, acetic acid. I find V in practice that t e solution is very much improved by the addition of the acetic acid as described, particularly as to its spreading and Washing qualities.

If linseed oil 'is to be employed the following is the formula which I prefer 24 ounces raw linseed oil.

56 ounces denatured alcohol. 48 ounces hydrochloric acid.

9 13 ounces acetic acid.

Application filed April 26, 1924. Serial No. 709,201.

These ingredients are preferably compounded as described in my said prior application. If glycerine is employed the following is the formula which I prefer:

32 ounces hydrochloric acid. 64 ounces denatured alcohol.

32 ounces glycerine. 15 ounces acetic acid. The rust removing compounds produced by the following formulae are used as described in my said rior application.

What I c aim is l. A- metal cleaning compound containing an acid which will attack rust, acetic acid in addition thereto, a rust preventing .linseed oil, alcohol, hydrochloric acid and acetic acid.

5. A metal cleaning compound containing raw linseed oil, alcohol, hydrochloric acid and acetic acid. y f

6. The metal cleaning compound comprising 24 parts by volume of raw linseed oil, 56 parts of denatured alcohol, 48 parts hydrochloric acid and 13 parts acetic acid.

In testimony whereof I aflix my signa- I ture.

JOHN J. .va-au BUHLER. 

